I can’t with this app – uMake: 3D Modeling CAD, Design Review

I have tried to get into the app plenty of times considering I have an iPad mini 4 that is pretty new, the problem is when I get into the app when I press the sign in button or whatever it said to get in, it keeps saying “oops try again” and I pretty much tried many times and still not able to get in. So I was like “Oh maybe it’s a WiFi problem” and tried logging back on to my WiFi and this still doesn’t work. So I haven’t even been able to get onto the App
Review by MisterFishsause on uMake: 3D Modeling CAD, Design.